60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
// SPDX-License-Identifier: LGPL-3.0-or-later
|
|
|
|
/**
|
|
* \file strncpyz.c
|
|
*
|
|
* Implements `Df_strncpyz()`.
|
|
*
|
|
* \copyright The DoubleFourteen Code Forge (C) All Rights Reserved
|
|
* \author Lorenzo Cogotti
|
|
*/
|
|
|
|
// THIS CODE IS DERIVED FROM OpenBSD strlcpy.c
|
|
// ORIGINAL LICENSE TERMS FOLLOW:
|
|
|
|
/* $OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1998, 2015 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
// ORIGINAL LICENSE TERMS END ***
|
|
|
|
#include "strlib.h"
|
|
|
|
size_t Df_strncpyz(char *dst, const char *src, size_t n)
|
|
{
|
|
const char *osrc = src;
|
|
size_t nleft = n;
|
|
|
|
// Copy as many bytes as will fit
|
|
if (nleft > 0) {
|
|
while (--nleft != 0) {
|
|
if ((*dst++ = *src++) == '\0')
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Not enough room in dst, add NUL and traverse rest of src
|
|
if (nleft == 0) {
|
|
if (n > 0)
|
|
*dst = '\0'; // NUL-terminate dst
|
|
|
|
while (*src++ != '\0');
|
|
}
|
|
|
|
return src - osrc - 1; // count does not include NUL
|
|
}
|